Work holding device



sept 19, 1933- G. w. ANDREWS, JR 1,927,675

WORK HOLDING DEVICE Filed Sept. 30, 1929 attenua,

Patented Sept. 19, 1933 UNiTED STATES WORK HOLDING DEVICE j George W. Andrews, Jr., Vernon, Conn;

Application' September 30, 1929 Serial No. 396,175

'4 claims. (o1. 51.-216) e being particularly adapted for holding Vvalve bodies, the chambers, cylinders or valve seats of whichV are to b reamed, lapped or polished. The aim of the'present invention is to provide certain improvements and advancements in the structure shown in my' said application.

,v More particularly, anaim of the invention is to provide an improved Work holdingV device having the advantages disclosed iii-my said application and wherein the work holder per se may be positioned either vertically or horizontally depending upon the character of the work to be operated upon. The Work holding element is adapted to be brought to a horizontal plane so that the chamber or cylinder in the work to be operated upon is vertically disposed with the result that when the tool is placed in this chamber or cylindeig'there is no :tendency for the tool, due to its weight, to bear against one portion of the chamber more than against other portions.

' A further object of the invention is to provide a vsimple and effective larrangement 'bymeans of which the above and other objects maybe easily, quickly .andI economically obtained. l

' Other objects will be in part obvious and in part pointed out more in detail hereinafter.

The invention accordingly consists in the features of construction,V combination oi elements and arrangement of parts which will be exemplified in the construction hereinafter. set vforth and the scope of the application of which will be indicated in the appended claims.

In the accompanying drawing, wherein I have shown, forillustrative purposes, one of the many embodiments which the present invention may 0 take:

Figure l is a central' vertical sectional view through the device, the work holder being vertically disposed;

Fig. 2 is a'frontrview of they work holding device; and l y Fig. 3 is a View similar to Fig. 1 but showing the work holder adjusted to horizontal position.'rv

Vthe usualV bolts 13.

"radially through the slot 15.

ment. The slides may be clamped in place by Arising from the slide 11 is avertical cylindrical boss or hub` 14:l which is internally threaded and Awhich has a slot 15 adjacent its lower end. -Threadedin the hub for .adjustment about a vertical axis is an` upstanding ystud or stem 16. For the purpose of clamping this stud and the parts carried'thereby in any predetermined position of adjustment,l Vthere is provided on the lower end of the screw or stem 16 a nut 17 having a handle 18 extending When kit is desired to adjust this stem 416, the nut is turned by means of the handleV so that the handle 17'0 does not engage Yeither the upper or lower surfaces ofthe slot. After the stem or screw 16 has been adjusted, it may be locked in'position by turning the handle Y18 and bringingY it into -PTF-Ii'l"A OFFICE.

frictional engagement with the upper or lower surface of the slot. 'y

Mounted upon the I.upper end of the stem, in the manner hereinafter described more in detail,

is the workv holding device per se which corre- I k22,*,thle latter being ljournalled inthe central `bearing ofthesupport 2G. The work holder is Carried by this support for"rotaryjheld against endwise movement relative to the member 20 by means of .nuts 24 and 25 in the same manner as is disclosed in mysaid application.` The forward'end of the' centralopening in the disk 2l is threaded, as at 26, so that the vnipple of the valve body or other piece vof work may be secured therein. fThe disk 21 has two series of openings 28 and "29 which areadapted Vto receive the Screws by means of which the Work is adapted to be secured to the diskall as disclosed vin my said application. The disk,v is furtherprovided with ahandle 29 by meani of which the disk may be adjusted v0r turned about its axis. For the purpose of. securing the disk 21 in any one of a" number'of predetermined angular positions, there is provided, adjacent the outer periphery of the disk, aplurality of openings 30 with which is adapted'to cooperate a' locking plunger or key 31 carried by the support v 20 and having vahandle 32. The parts so far described are generally similar to those illustrated in my said application. j y

In accordance with the present invention, I provide means whereby the Y. work holder may be brought to a horizontal position, asshown Vin Fig. 3. To this end, there is interposed, be-

support is adapted to swing in a vertical( plane through an angle of 90, thatl is, from the vertical position shown in Fig. 1 to the horizontal position shown in Fig. 3. For the purpose oi locking the ball and socket together inV such position that the work holderk is vertically disposed, as shown in Fig. 1, there is provided in the ball a spring pressed plunger 43, the upper end of which is adapted,I to take into a notch 44 in the socket. Behind the plunger is a spring 45 which normally urges the plunger intolookingv position. Extending from the plunger is Va handle 46. vWhen it is desired to disengage the plunger fromthe socket member, the handle is depressed, andk then the `socket member maybe swung from'the position shown in Fig. l to that shown ini Fig. 3. .When the socket member is swung back to the position ljshown in Fig. 1, the plunger automatically en- A Y. periphery of the boss 14, spaced apart vertically extending grooves 50, and provided on the socket member or the stem extendingupwardly there- V,from is a radially extending arm 5l adapted to vselectively engage inthe grooves Y50,.

tance between the bottoms ofthe grooves 50 `and J the axis of the stem 16 isequal to the distance between the pivot pins 42 and the underside The disof the arm "51 so that, whenV the parts are in the position shown4 inv Fig. 3, vthis arm is parallel to `and engages against the bottom face of the Y groove in which it is engaged. The width ofthe arm is substantially the same as the width oi the grooves so' that the arm hasrnoplay i-n the grooves, and this steadies the workholder when it is in a Yhorizontal plane. It will be observed that, irrespective of the vertical position of Aadjustment of the stem 16, the armi-5l, when the y work holder is in horizontal position, isv parallel to the axis of the stem 16 and to the bottoms of f thegrooves 50. Y

When it is desired to hand lap or polish the wall of a cylinder or chamberin a piece of work by `means of a ktool adapted to be rotated therein,

the work holder, byV preference, is broughtv to the horizontal position shown in Fig. 3. In this position of the parts, there is no tendency for the tool to bear against one side of the chamber more than against the other side, as would be the case if lthe tool were horizontally disposed.V

Also, when the Work is operated upon, withthe work holder horizontally positioned, ther-operator may more readily/and conveniently operate the tool and see what is going on. f

As many Vchanges could be made in the above construction and many apparently widely different embodiments of this inventioncould be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense. ,It isalso to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention which, as a matter of language, might be said to fall. therebetween.

I claimlas my invention: 1. In `a work holding device of the character 9 described', a vertical hub having a plurality of vertically extending grooves spaced about` its vperiphery, a stem threaded into said hub for angular adjustment about a vertical axis, a support, a pivotal connection between said stem and supportjwhereby the latter may be moved to vertical and horizontal positions, a work holder carried by said support for angular .adjustment about its own axis, and an armextending .from saidsupport and adapted to 'selectively engagelOU in said grooves. f n

2. Ina work-holding deviceof the character described, a vertical hub, a stem mounted therein for ,angular adjustment about a vertical axis, a support, a 'pivotal connection between-said stem/i105 and support whereby lthe latter m-ay be moved to vertical and horizontal positions, a work holder carried by said v*support for angular VVadjustment, means carriedbyfsaid support andadapt- `ed tovengage said hub 'to 'hold fsaidsupport .1113110 horizontal position, and meansrior locking-said support in vertical position vcomprising 'a spring pressed plungercarried by'said stem and a notch in said support in whichsaid plunger is adapted y to engage. K v

3. In a lwork holding device of the character described, a hub having a plurality of grooves spaced about its periphery,- a work holder, a pivotal connection between said hub and work holder whereby the latter may bemoved to ver-'r tical and horizontal positions,I and means extending from said support and adapted to vselectively engage in said 'grooves Ain the ,-hub.

4. In a work holding device of the character described, a hub, .a stemmounted in YsaidY .hub for angular adjustment about a vertical axis, a support carried by said stem, a pivotal connection betweensaid stem and support whereby the latter may be swung `from a verticalto .a horizontal position, a work holder carried by* said support for angular adjustment Yabout a horizontal axis whensaid support isin vertical position and about a vertical axis when said support is in horizontal position, means carried by said stem and cooperating with said supportfl for locking said .support and holder in vertical v position with respect to said stem, and interengaging means on saidsupport and hub adapted, when saidsupport `is in horizontal position, to co-act to hold said supportin said position* and against rotary movement in a horizontal plane, saidv interengaging means `being arranged to hold said support selectively 'in any 4one of a plurality of angular positions with respect .to th hub.`

v y Lao GEORGE w; ANDREWS, .Jn 

